Difference between revisions of "Atmospheric Pressure"
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: [[Fluid Pressure|Pressure]] in a [[fluid]] is due to the [[weight]] of the [[fluid]] above the [[object]]. As an [[object]] gets higher, there is less [[atmosphere]] above that [[object]]. | : [[Fluid Pressure|Pressure]] in a [[fluid]] is due to the [[weight]] of the [[fluid]] above the [[object]]. As an [[object]] gets higher, there is less [[atmosphere]] above that [[object]]. | ||
: The reduction in [[pressure]] is related to the [[density]] and motion of [[particle]]s in the [[atmosphere]]. | : The reduction in [[pressure]] is related to the [[density]] and motion of [[particle]]s in the [[atmosphere]]. | ||
| − | At higher | + | At higher altitudes: |
*The [[atmosphere]] is less [[density|dense]] - Less frequent [[collision]]s between the [[particle]]s and the surface of the [[object]]. | *The [[atmosphere]] is less [[density|dense]] - Less frequent [[collision]]s between the [[particle]]s and the surface of the [[object]]. | ||
*The [[temperature]] is colder - [[Particle]]s move more slowly leading to less [[collision]]s and the [[collision]]s which do happen occur with less [[force]]. | *The [[temperature]] is colder - [[Particle]]s move more slowly leading to less [[collision]]s and the [[collision]]s which do happen occur with less [[force]]. | ||
| + | |||
| + | ==Key Stage 4== | ||
| + | ===Meaning=== | ||
| + | '''Atmospheric Pressure''' is the [[pressure]] on an [[object]] due to the [[particle]]s of [[gas]] in the [[atmosphere]] [[collide|colliding]] with the [[object]]. | ||
| + | |||
| + | ===About Atmospheric Pressure=== | ||
| + | : '''Atmospheric Pressure''' changes with '''height''' above the [[Earth]]s surface. The higher up, the lower the [[pressure]]. | ||
| + | : The '''atmospheric pressure''' at [[Sea Level|sea level]] is 101,000Pa. | ||
| + | : The [[force]] responsible for '''atmospheric pressure''' is the [[weight]] of all the [[particle]]s above the [[object]]. | ||
| + | |||
| + | ===Variation with Height=== | ||
| + | : As the height of an [[object]] increases the '''atmospheric pressure''' decreases. | ||
| + | : [[Fluid Pressure|Pressure]] in a [[fluid]] is due to the [[weight]] of the [[fluid]] above the [[object]]. As an [[object]] gets higher, there is less [[atmosphere]] above that [[object]]. | ||
| + | : The reduction in [[pressure]] is related to the [[density]] and motion of [[particle]]s in the [[atmosphere]]. | ||
| + | At higher altitudes: | ||
| + | *The [[atmosphere]] is less [[density|dense]] - Less frequent [[collision]]s between the [[particle]]s and the surface of the [[object]]. | ||
| + | *The [[temperature]] is colder - [[Particle]]s move more slowly leading to less [[collision]]s and the [[collision]]s which do happen occur with less [[force]]. | ||
| + | |||
| + | ===References=== | ||
| + | ====AQA==== | ||
| + | :[https://www.amazon.co.uk/gp/product/0008158762/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158762&linkCode=as2&tag=nrjc-21&linkId=a0fffa35b3ea49a63404f6704e0df7cc ''Atmospheric pressure, page 120-1, GCSE Chemistry; Student Book, Collins, AQA ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1471851370/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1471851370&linkCode=as2&tag=nrjc-21&linkId=01c69b0ae058f809cf636033e6ba793e ''Atmospheric pressure, page 139, GCSE Physics, Hodder, AQA ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1782945970/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945970&linkCode=as2&tag=nrjc-21&linkId=a120d24dcc7cc7a58192069a3aafc1d2 ''Atmospheric pressure, page 171, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/019835939X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=019835939X&linkCode=as2&tag=nrjc-21&linkId=57e96876985fc39b1a3d8a3e3dc238b6 ''Atmospheric pressure, pages 166-167, GCSE Physics; Third Edition, Oxford University Press, AQA ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/0008158770/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158770&linkCode=as2&tag=nrjc-21&linkId=ec31595e720e1529e49876c3866fff6e ''Atmospheric pressure, pages 174-5, GCSE Physics; Student Book, Collins, AQA ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/178294558X/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=178294558X&linkCode=as2&tag=nrjc-21&linkId=f0dfb66dafcb0c6e9449e7b1a4ae1ac23 ''Atmospheric pressure, pages 41, 59, GCSE Physics; The Revision Guide, CGP, AQA ''] | ||
| + | ====Edexcel==== | ||
| + | :[https://www.amazon.co.uk/gp/product/1782945733/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945733&linkCode=as2&tag=nrjc-21&linkId=2a2dbec9db6bf5766c0458d908fa0a52 ''Atmospheric pressure, page 102, GCSE Physics; The Revision Guide, CGP, Edexcel ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1292120223/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120223&linkCode=as2&tag=nrjc-21&linkId=068ecf40278c32406a7f1c6e66751417 ''Atmospheric pressure, page 202, GCSE Physics, Pearson Edexcel ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/1782948163/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782948163&linkCode=as2&tag=nrjc-21&linkId=0fdbfd5dd397d6e24a9dfb250f08587f ''Atmospheric pressure, page 319, GCSE Physics, CGP, Edexcel ''] | ||
| + | |||
| + | ====OCR==== | ||
| + | |||
| + | :[https://www.amazon.co.uk/gp/product/1782945687/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1782945687&linkCode=as2&tag=nrjc-21&linkId=9a598e52189317a20311d7a632747bc9 ''Atmospheric pressure, page 19, Gateway GCSE Physics; The Revision Guide, CGP, OCR ''] | ||
| + | :[https://www.amazon.co.uk/gp/product/0198359837/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0198359837&linkCode=as2&tag=nrjc-21&linkId=3c4229e8b023b2b60768e7ea2307cc6f ''Atmospheric pressure, pages 38-39, Gateway GCSE Physics, Oxford, OCR ''] | ||
Latest revision as of 17:39, 30 November 2019
Contents
Key Stage 3
Meaning
Atmospheric Pressure is the pressure on an object due to the particles of gas in the atmosphere colliding with the object.
About Atmospheric Pressure
- Atmospheric Pressure changes with height above the Earths surface. The higher up, the lower the pressure.
- The atmospheric pressure at sea level is 101,000Pa.
- The force responsible for atmospheric pressure is the weight of all the particles above the object.
Variation with Height
- As the height of an object increases the atmospheric pressure decreases.
- Pressure in a fluid is due to the weight of the fluid above the object. As an object gets higher, there is less atmosphere above that object.
- The reduction in pressure is related to the density and motion of particles in the atmosphere.
At higher altitudes:
- The atmosphere is less dense - Less frequent collisions between the particles and the surface of the object.
- The temperature is colder - Particles move more slowly leading to less collisions and the collisions which do happen occur with less force.
Key Stage 4
Meaning
Atmospheric Pressure is the pressure on an object due to the particles of gas in the atmosphere colliding with the object.
About Atmospheric Pressure
- Atmospheric Pressure changes with height above the Earths surface. The higher up, the lower the pressure.
- The atmospheric pressure at sea level is 101,000Pa.
- The force responsible for atmospheric pressure is the weight of all the particles above the object.
Variation with Height
- As the height of an object increases the atmospheric pressure decreases.
- Pressure in a fluid is due to the weight of the fluid above the object. As an object gets higher, there is less atmosphere above that object.
- The reduction in pressure is related to the density and motion of particles in the atmosphere.
At higher altitudes:
- The atmosphere is less dense - Less frequent collisions between the particles and the surface of the object.
- The temperature is colder - Particles move more slowly leading to less collisions and the collisions which do happen occur with less force.
References
AQA
- Atmospheric pressure, page 120-1, GCSE Chemistry; Student Book, Collins, AQA
- Atmospheric pressure, page 139, GCSE Physics, Hodder, AQA
- Atmospheric pressure, page 171, GCSE Physics; The Complete 9-1 Course for AQA, CGP, AQA
- Atmospheric pressure, pages 166-167, GCSE Physics; Third Edition, Oxford University Press, AQA
- Atmospheric pressure, pages 174-5, GCSE Physics; Student Book, Collins, AQA
- Atmospheric pressure, pages 41, 59, GCSE Physics; The Revision Guide, CGP, AQA
Edexcel
- Atmospheric pressure, page 102, GCSE Physics; The Revision Guide, CGP, Edexcel
- Atmospheric pressure, page 202, GCSE Physics, Pearson Edexcel
- Atmospheric pressure, page 319, GCSE Physics, CGP, Edexcel